Mitering-machine.



No. 555.421. Patented Aug. 7, moo.

. .1. L. TYLER.

M'ITERING MACHINE.

. (Application filed Sept. 6, 1899.)

(No Model.) 3 Sheets-Sheet 1..

WITNESSES: L VVENTOR. W 7. I z. J 6 m BY ATTORNEYJ 'IHE Nomus PETERS co.PHOTO-LYTHQ- wAsumc-rou. u. c.

No. 655,42l. Patented Aug. 7 I900. I

.1. L. TYLER.

MITERING MACHINE.

A nmidn filed Sept. 6, 1599. (No Model.) 3 Sheets8heet 3.

WITNESSES} IJ-VENTOR.

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ATTORNEYJ m: nonms PETERS ca. PHoTc-uma. WASHINGTON, a. c.

UNITED STATES PATENT FFlCe JOSEPH L. TYLER, or LYNN, MASSACHUSETTS;

MITERING-MACHINE.

srEorFIcA'rroN forming part of Letters Patent No. 655,421, dated August7, 1900.

7 Application filed-September 6, 1899. Serial No. 729,577. (No model.)

To aZZ whom it may concern:

Be it known that I, JOSEPH L. TYLER, of

Lynn, in the county of Essex and State of Massachusetts, have inventedcertain new and useful Improvements in Mit ering-Ha-- chines for cuttingand planing the ends of picture-frame moldings and other work, and hasfor its object toimprove the general construction and operation of suchmachines.

To this end the invention consists in, first, an improvement in thefront gage whereby the latter may with facility be adjusted bothlongitudinally and angularly'; second,' an improvement in the guides forthe cutterhead whereby said guides may be adjusted for wear; third, animprovement in the vertical adjustment of the cutter-head to compensatefor the change in position of the cutting edges due to sharpening of theknives, and, fourth, an improvement in the driving mechanism whereby theclutch employed therein may be automatically held in operation duringthe upward or return stroke of the cutter.

Of the accompanying drawings, Figure 1 represents a rear elevation of amitering-machine embodying my invention. Fig. 2 represents a plan" viewthereof. Fig. 3 represents a side elevation. Fig. 4 represents a Sectionthrough the gage-clamp. Fig. 5represents a transverse section throughthe shafts, showing the automatic clutch oontrolling mechanism.

The same reference characters indicate like parts in all the figures.

Referring to the drawings, 1 designates the frame of the machine, whichhas a worksupporting table 2 at its upper end, and its lower end isprovided with bearings for the drive-shaft 3 and for the crank-shaft 4.The drive-shaft 3 has a pinion 5, meshing with a gear 6 onthe'crank-shaft,whereby the former shaft when rotated drives the latter.

8 represents the cutter-head, mounted to slide vertically in suitableguides 11 11 and having attached to it the V-shaped cutter, consistingof a knife or knives set at a right angle and having downwardly andoutwardly inclined cutting edges which give a shearing out. Thecrank-shaft 4: is provided at its middle portion with a crank 7,connected by a pitman or connecting rod 9 with the cutter-head S, therevolution of the crank-shaft 4. imparting a vertical reciprocatorymotion to the cutter-head 8.

The continued sharpening of the knives 1O composing the cutter reducestheir width and tends to change the relative position of the cuttingedges with relation to the cutterhead and work-table. It has beencustomary to adjust the knives downwardly on the cutter-head tocompensate for this decrease, the cutter-head being provided with a rowof two or-more holes for each of the attachingbolts which secure theknives to the head; but the principal objection to this method is thatthe bolt-holes cannot be spaced near enough together to give a smalladjustment. I provide an improvement by making the connecting-rod 9adjustable. Said .rod, as shown, consists of an upper part 19, connectedto the cutter-head 8, and a lower part 20, connected to the crank 7. Thetwo parts are held together by bolts 21 21, which pass through elongatedslots 22 22 in the part 20 and screw into the part 19. This permits thelength of the connecting-rod to be increased or decreased,and theconnection when tightened is locked by means of the engagement of teeth23 23, formed on the respective parts 19 and 20. The locking-teeth 23may be Spaced as closely as desired, so as to permit of any desireddegree of adjustment.

The guides 11 11 for the cutter-head 8 are elongated vertically, and inhorizontal section they have approximately a U shape, the ends of the Uembracing tongues 24 24, formed on the sides of the cutter-head. Thiscross-sectional shape and the thickness of the metal in the guides 11are such as to make said guides springy, permitting the ends of the U tobe drawn together to a limited extent. The

distance between the ends of the U is regulated by means of bolts 25 25,passing transversely through the legs of the'U-guides. As the guidingportions of the cutter-head and guides wear away through continued usethese bolts are tightened up to compensate for the wear, as will bereadily understood.

12 represents a belt-pulley mounted loosely upon the drive-shatt 3 andmovable longitu- IOL) dinally thereof and also formed with an internalconical surface adapted to be engaged by a eomplemental cone 13, securedto the shaft 3, the two members 12 and 13 forming parts of a clutch offamiliar construction. The two parts norm ally tend to become disengagedand are adapted to be pressed together into driving engagement by abeveled roller 14, mounted on the end of an-arm 15, secured to arock-shaft 1 6. A treadle 17, normally elevated by a spring 18, is alsosecured to said rock-shaft, and by depressing the treadle the clutchmemberswill be engaged and the shaft 3rotated. In order that thecomplete return of the cutter-head after a downward-cutting stroke maybe insured, I have provided a device for automatically holding theclutch in operation during said return or upward stroke, said deviceconsisting, as shown, of a cam 26, secured to the crank-shaft 4 andadapted to engage a roller 27, mounted at the, end of a short arm 28,which is secured to the treadle 17. The cam 26 is of a segmental formand engages the roll 27 only during the upward half of the revolution ofthe crank 7, and while the cam is in engagement with the roll thetreadle cannot be elevated to release the clutch. The cam and rolloperate in conjunction with a brake consisting of a drum 29, secured tothe drive-shaft 3, and a friction-shoe 30, attached to the treadle 17near its pivot-.16. When the treadle is in its elevated position, thebrake-shoe 30 is in engagement with the drum 29, and the shafting istherefore held from rotation. It is, evident from the above that theoperator has full control over the cutter-head during the descendingstroke of the latter, and he can move said cutter as slowly as desireddown toward the work by vibrating the treadle. to a small are andalternately engagingand disengaging the clutch but after thecuttingstroke has been made the cam 26 comes into action and preventsthe release of the clutch, as stated, compelling the cutterhead to makeits full return stroke. In other words, thecluteh-controllin gdevice.viz. ,the treadle and the parts operated therebyinelude means forvarying the speed of movement of the cutter-head during-its downwardmovement, while the action of the cam 26 is to prevent the release ofthe clutch during the movement of the cutter-head in theother direction.This enables the operator to also stop the cutter at any point duringitsdownward movement, so that if it is discovered j ustafter startingthe downward movement of the cutter that the Work is not correctlyplaced such movement of the cutter can be stopped, or its movement maybe. so slow as to enable the work to be properly positioned if it hasslipped.

The table 2 isequipped with apair of front gages 32 32 for properlypositioning the, work with; respect to the cutter, said gages beingpivotally mounted upon independent gageblocks 31, which are .fitted toslide toward and from the. cutter in grooves 33 33, formed in the table2. Each of the blocks 31 is formed with an upwardly-projecting stud 37,as seen in section in Fig. 4, through which passes a bolt 35, screwingat its lower end into a clamping-plate 36, located below the table 2,and the gage 32 is formed with a split collar 38, surrounding said studand provided with a clamping-bolt 39. A washer 39' is interposed betweenthe upper edge of the collar 38 and the head of the bolt 35. Theclamping-plate 36 is further suspended from the block 31 by aloosely-adjusted suspending-bolt 40, which prevents the plate 36 fromturning. \Vhen the block 31 is brought forward, it abuts against ashoulder 41, forming the end of the groove 33, and is automatically heldin this position by a dog 42, hinged to the rear end of the block 31 andadapted to engage a notch atthe bottom of the groove 33. By looseningthe bolt the gage 32 may be adjusted angularly about, itsv pivot. andthen clamped by retightening the bolt, and longitudinal adjustmenttoward and from the cutter is in the same manner efiec-ted by looseningthe bolt 35 andsliding the block 31 along its groove and then elampingitby re-. tightening the bolt 35. To get the proper angular adjustment foreach of thegages 32, I provide the table 2 with segmental indexes 43 43,graduated in degrees and having their centers at the pivotal point ofthe gages32 when the blocks 31 are abutting the shoule ders 41. providedwith a small index-finger 44, aflixed by a. set-screw 45. should beapproximately on a line through the pivotal center of the gage parallelto the, front end of the. gage, but may be moved slightly with respectto the gage by manipulating the set-screw 45 so as to compensatefor anyslight changes in the position of the. cutter.

On the sides of the table 2 are shown the inner ends of twoextension-tables 47 47, mounted upon bases4949,which areadapted The endof each of the gages32 is;

Theend of this finger to slide along tracks or guides. 48 48, the 7tables being pi votally secured to the bases.49..

2. In a machine of the. character specified,

a cutter-head, mechanism for reciprocating the same, driving mechanism,aelutch for connecting said mechanisms, aw clutch-controllingdeviceincluding means. for varying the, speed of movement of the cutter-headin one direction, and a cam connected with thecutter-head-reciprocatingmechanism for pres.

venting the release of the clutch during movement of the cutter-head inthe other direction.

3. In a machine of the character specified, a cutter-head, a crank-shafthaving a crank connected with and adapted to reciprocate said head,driving mechanism, a clutch adapted to connect said driving mechanism tosaid crank-shaft, a treadle controlling said clutch and carrying aroller and free to vary the speed of movement of the cutter-head in onedirection, and a segmental cam'secured to said crank-shaft and arrangedto engage said roll and hold the clutch in operation during thecutter-head-returning stroke of the crank.

4. In a machine of the character specified, a cutter-head, mechanism forreciprocating the same, driving mechanism, a clutch for connecting saidmechanisms, a clutch-controlling device including means for varying thespeed of movement of the cutter-head in one direction, a cam connectedwith the cutter-headreciprocating mechanism for preventing the releaseof the clutch during movement of the cutter-head in the other direction,and a brake operated by said clutch-controlling device, and adapted torestrain the reciprocating mechanism.

5. In a machine of the character specified, a cutter-head, mechanism forreciprocating the same, a drive-shaft carrying a drive-pulley, and aclutch adapted to connect said pulley to said shaft, a brake-drumsecured to said drive-shaft, a treadle controlling said clutch and freeto vary the speed of movement of the cutter-head in one direction andhaving a brake-shoe adapted to engage said drum and a roller, and a camsecured to said crankshaft and arranged to engage said roller and holdthe clutch in operation during the cutter-head-returning stroke of thecrank.

6. In a machine of the character specified, a cutter-head provided witha guiding-tongue, an elongated guide therefor flexible and substantiallyU-shaped in cross-section with the ends of the U embracing said tongue,and means for increasing and decreasing the distance between the ends ofthe U.

7. In a machine of the character specified, the cutter-head 8 having theguiding-tongues 24, 24, the elongated guides 11, 11 flexible andsubstantially U-shaped in cross-section with the ends of the Usembracing said tongues, and the bolts 25, 25 passing transverselythrough said guides and adapted to increase and decrease the distancebetween the ends of the Us.

8. In a machine of the character specified, a work-supporting table, agage-block mounted to slide longitudinally thereon, and having anupwardly-projecting stud, a gage having a split collar surrounding saidstud and a bolt adapted to clamp said collar to said stud, aclampingplate located below the table and a bolt passing through saidstud and screwing into said plate.

9. In'a machine of the character specified, a work-supporting tablehaving two parallel guideways, two independent gages each of which isadjustable along said guideways and each being pivotally adjustable,means for clamping said gages longitudinally and pivotally, abntmentsfor determining the longitudinal movement of said gages in one directionto secure their being brought parallel with each other, and a segmentalindex on the table for each of said gages and adapted to cooperatetherewith in determining the pivotal adjustment of each gage whenpositioned by its abutment.

In testimony whereof I have affixed my signature in presence of twowitnesses.

JOSEPH L. TYLER.

Witnesses:

SYDNEY S. CHANDLER, WM. G. CHANDLER.

